Sliding caliper with automatic locking device



Sept. 15, 1931. e. HOMMEL SLIDING CALIPER WITH AUTOMATIC LOCKING DEVICE Filed March 19. 1950 Ill/ll A LL42; "Qa III/l/l/IIII Patented Sept. 15, 1931 UNITED STATES GEORG HOMMEL, OF ALD'INGEN, NEAR SPAICI-IINGEN, GERMANY SLIDING CALIPER WITH AUTOMATIC LOCKING DEVICE Application filed March 19, 1930, Serial No. 437,221, and in Germany March 11, 1929.

Most of the sliding calipers of known type with automatic locking devices present the inconvenience that their locking is either not secure enough, or that the releasing of the sliding element requires a too strong,

fatiguing pressure upon the lever.

The object of this invention is to obviate these inconveniences.

An embodiment of the invention is illus- 1 trated by way of example in the accompanying drawings in which:

Fig. 1 is a front elevation of the sliding caliper Fig. 2 is a section on line III and Fig. 3 is a section on line III-III of Fig. l.

The sliding caliper with automatic spreading springs locking device consists of the main part a, and sliding element, 6, the pressure lever 0, the spiral spring (Z, the spring 7 with the ends 7" and 7, the bolts 9 and g and the bolt 2'.

The spring f has cut out portions 70 and 7c and a lateral projection m.

By the pressure exerted by the spiral spring (Z upon the projection m of the spring f the latter is shifted in the sliding element 7) and the bolts 9 and g are pushed out ofthe cut-out portions is and is and into the tapering slots until the parts f and f of the spring press strongly against the main part a and the sliding element F) and mutually securely lock these parts. As the pressure of the spring f acts upon two points it is strong enough to prevent a mutual shifting of the parts a and 6 without a specially strong spiral spring ol.

Only a light pressure upon the lever c is therefore necessary to release the sliding element 7). After the releasing of the lever 0 the sliding element Z) is again locked automatically on the part a.

Claims:

1. A sliding caliper with automatic looking device, comprising in combination With the sliding element, a spring having cut out portions and tapering slots extending from these out out portions and said spring being adapted to serve for locking said sliding element.

2. A sliding caliper as specified in claim GEORG HOMMEL. 

